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Finding the Fourth Proportional to 612,751.80, 919,062.90 and 192,005.40

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Solution

The fourth proportional to 612,751.80, 919,062.90 and 192,005.40 is: 287,987.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,751.80 : 919,062.90 = 192,005.40 : x
  2. Step 2: Convert to fraction form
    612,751.80/919,062.90 = 192,005.40/x
  3. Step 3: Cross multiply
    612,751.80x = 919,062.90 × 192,005.40
  4. Step 4: Simplify right side
    612,751.80x = 176,465,039,739.66
  5. Step 5: Solve for x
    x = 176,465,039,739.66/612,751.80
  6. Step 6: Final answer
    x = 287,987.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.